16521653481886 has 24 divisors (see below), whose sum is σ = 29607802472304. Its totient is φ = 6772851734880.

The previous prime is 16521653481881. The next prime is 16521653482003. The reversal of 16521653481886 is 68818435612561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16521653481881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1115416135 + ... + 1115430946.

It is an arithmetic number, because the mean of its divisors is an integer number (1233658436346).

Almost surely, 2^{16521653481886} is an apocalyptic number.

16521653481886 is a deficient number, since it is larger than the sum of its proper divisors (13086148990418).

16521653481886 is a wasteful number, since it uses less digits than its factorization.

16521653481886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230847136 (or 2230847113 counting only the distinct ones).

The product of its digits is 66355200, while the sum is 64.

The spelling of 16521653481886 in words is "sixteen trillion, five hundred twenty-one billion, six hundred fifty-three million, four hundred eighty-one thousand, eight hundred eighty-six".